Hello,
I am currently facing the following problem: I have a server with two interfaces: - em1 (Outbound / facing the Internet) - em0 (Internal use / LAN) (additionally: vlan1000 - parentdev is em0) The server runs OpenBSD 6.6-stable with the latest syspatches installed and rebooted to the patched kernel. I assigned one address of the /56 my provider gave me to em1. Let's say it looks like this (obfuscated): Prefix = 2a02:aaaa:bbbb:cc00::/56 Gateway (provider) = 2a02:aaaa:bbbb:cc00::1 I assigned to em1: 2a02:aaaa:bbbb:cc00::2/56 ### /etc/hostname.em1 ### inet6 2a02:aaaa:bbbb:cc00::2 56 !route add -inet6 default 2a02:aaaa:bbbb:cc00::1 -soii ----------------------- This far, everything works (inbound and outbound IPv6 connectivity). In the next step I took a /64 from that range and assigned an address to the vlan1000 interface: 2a02:aaaa:bbbb:ccff:dead::1 ### /etc/hostname.em0 ### up ----------------------- ### /etc/hostname.vlan1000 ### inet 10.20.30.40 255.255.255.0 vnetid 1000 parent em0 inet6 2a02:aaaa:bbbb:ccff:dead::1 64 ----------------------- This worked "somehow" (e.g. for a short period of time) "Worked" means: This address was reachable from the outside world and vice versa. After it stopped working I did a reboot and then it worked again (for a limited amount of time) All i can see (from tcpdump) is that the provider gateway sends NDP solicitations, asking for 2a02:aaaa:bbbb:ccff:dead::1 But no replies are appearing. The same behaviour occurs independently from either - pf disabled or - allowing anything IPv6 related (icmp-v6 etc.) I already enabled net.inet6.icmp6.nd6_debug but nothing shows up in dmesg. Has anyone encountered this as well and/or has hints on how to solve this? Thank you very much for your time. Best regards, Alex
